basic

Magnetic Flux Through a Planar Loop Calculator

Φ = B · A · cos θ — webers (Wb).

Compute the magnetic flux Φ through a flat loop of area A placed in a uniform magnetic field B at angle θ between the field and the loop's surface normal: Φ = B · A · cos θ. Maximum when θ = 0° (field perpendicular to loop surface); zero when θ = 90° (field parallel to loop surface).

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

T
m²
°

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Φ = B · A · cos θ.

In depth

Compute the magnetic flux Φ through a flat loop of area A placed in a uniform magnetic field B at angle θ between the field and the loop's surface normal: Φ = B · A · cos θ. Maximum when θ = 0° (field perpendicular to loop surface); zero when θ = 90° (field parallel to loop surface).